HL Topic A2.1 Origin of cells - 无忧得胜-网上国际课程 (5edu.win)

1#

1. Why are fatty acids or phospholipids important in the formatiow0 / y0gqf(gzan of cells and their zwag0qfgy/(0 components?

A. They are soluble.

B. They allow compartmentalisation of cells and organelles.

C. They only allow compartmentalisation of the nucleus.

D. They form cell walls.

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2#

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2. What is the acronym ofqrky+r :ty0(oo1ir .n0 -luaf the organism from which Homo sapiens is believed to hak(u af ro0or.q1 yn+tily 0r:-ve originally evolved?

A. LUCY

B. LUCA

C. HOMO

D. HELA

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3#

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3. Which of the following describes the conditions on early, pre-bioticx85-8qbtste f Earth?

A. B. C. D.

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4#

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4. Viruses are said to be non-living.List two reasons that viruses can*d f u1 ;iahwp ku9ug9,;li5vvnot be considered au9ivud f1lv*pg;i;w,59a kh us living organisms.

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5#

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5. Explain why RNA, rather than DNA, likely to be the first genetic mat/ mhi+1sczsk 4erial in living sz s4c1h+ /ikmorganisms.

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6#

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6. The Miller-Urey experiment produced organic molecules in an atmosphere t9*nzg 2gfyx-5y;j lohhat, in 1952, was thought to have been like the atmosphere on earth prior to the evolution of life. In which oj -f;gz*y h nx92g5lyway was the experiment’s model atmosphere different from today’s scientific understanding of the atmosphere at the origin of life on earth?

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7#

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7. Explain why the conditions on Earth today make the spontaneous for /zx0e4sa6b o sgr+1hgec( g pl2+cd2bmation of organic carbon compounds less likely compared to the conditions on Earth at the time of the origin of 0lz+b/ca bx1e42e6do(ggpc ss+g2 r hlife.

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8#

问答题 ( 1.0 分) 切至整卷模式搜藏此题

8. List the essential features that the first cells must have possessed to be wgdj.6o tv a+.0s85uqx 7le:r r 2zdzlable to live and evolve into the life forms txvrwjos5a dl.d6gl 7.2 :+terzuqz 08hat followed.

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